The number of cool names in the world are limited. Sometimes the same name for two totally different things appears, through no fault of any one but the fact that the name sounded cool at the time, and still does.
So relax. It is only a game, not a piece of art. Well, it could be art, but even artists sometimes use the same name. Yours will likely be more remembered because you've now made a big deal out of the name, but is that what you want it really remembered for? For you being all pissy about it? No, you want it remembered for being a great ship.
"Warlock's Xanthus." Think of it that way. Now take real pride in your accoplishment instead of harping on the details.
Don't be the next plaintif on Judge Judy.
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I know there is a method, but all I see is madness.